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5. Co-ordination chemistry — Chemistry STD 12 Science — Question

Gujarat BoardEnglish MediumSTD 12 ScienceChemistry5. Co-ordination chemistry1 Mark
MCQ
Which of the following is non-conducting ?
  • A
    $CoCl_3\, .\, 6NH_3$
  • B
    $CoCl_3\, .\, 5NH_3$
  • C
    $CoCl_3\, .\, 4NH_3$
  • ✓
    $CoCl_3\, .\, 3NH_3$
✓

Answer

Correct option: D.
$CoCl_3\, .\, 3NH_3$
d
As in octahedral complex, [ $\left.CoCl _3 .3 NH _3\right]$ doesn't form any ion so it is nonconducting.

But other complex give atleast one ion so they are conductor.

$CoCl _3 .4 NH _3$ gives two ion (one complex $+$ one chloride).

$CoCl _3 .5 NH _3$ gives three ion (one complex $+$ two chloride).

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